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Title: A Virtual Frame System for Stereotactic Radiosurgery Planning

Abstract

Purpose: We describe a computerized (or virtual) model of a stereotactic head frame to enable planning prior to the day of radiosurgery. The location of the virtual frame acts as a guide to frame placement on the day of the procedure. Methods and Materials: The software consists of a triangular mesh representation of the essential frame hardware that can be overlaid with any MR scan of the patient and manipulated in three dimensions. The software calculates regions of the head that will actually be accessible for treatment, subject to the geometric constraints of the Leksell Gamma Knife hardware. DICOM-compliant MR images with virtual fiducial markers overlaid onto the image can then be generated for recognition by the treatment planning system. Results: Retrospective evaluation of the software on 24 previously treated patients shows a mean deviation of the position of the virtual frame from the actual frame position of 1.6 {+-} 1.3 mm. Initial clinical use on five patients indicates an average discrepancy of the virtual frame location and the actual frame location of <1 mm. MR images with virtual fiducial markers can be imported into radiosurgical treatment planning software and used to generate an initial treatment plan. Conclusions: The virtualmore » frame provides a tool for prospective determination of lesion accessibility, optimization of the frame placement, and treatment planning before the day of the procedure. This promises to shorten overall treatment times, improve patient comfort, and reduce the need for repeat treatments due to suboptimally placed frames.« less

Authors:
 [1]; ; ; ;  [1];  [2]; ; ;  [1];  [2]; ;  [1]
  1. Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, Baltimore, MD (United States)
  2. Department of Neurosurgery, Johns Hopkins University, Baltimore, MD (United States)
Publication Date:
OSTI Identifier:
21172481
Resource Type:
Journal Article
Journal Name:
International Journal of Radiation Oncology, Biology and Physics
Additional Journal Information:
Journal Volume: 72; Journal Issue: 4; Other Information: DOI: 10.1016/j.ijrobp.2008.06.1934; PII: S0360-3016(08)03058-7; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0360-3016
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; COMPUTER CODES; EVALUATION; HEAD; IMAGES; OPTIMIZATION; PATIENTS; PLANNING; RADIOTHERAPY; SURGERY

Citation Formats

Ford, Eric, Purger, David, Tryggestad, Erik, McNutt, Todd, Christodouleas, John, Rigamonti, Daniele, Shokek, Ori, Sang, Won, Zhou, Jessica, Lim, Michael, Wong, John, and Kleinberg, Larry. A Virtual Frame System for Stereotactic Radiosurgery Planning. United States: N. p., 2008. Web. doi:10.1016/j.ijrobp.2008.06.1934.
Ford, Eric, Purger, David, Tryggestad, Erik, McNutt, Todd, Christodouleas, John, Rigamonti, Daniele, Shokek, Ori, Sang, Won, Zhou, Jessica, Lim, Michael, Wong, John, & Kleinberg, Larry. A Virtual Frame System for Stereotactic Radiosurgery Planning. United States. https://doi.org/10.1016/j.ijrobp.2008.06.1934
Ford, Eric, Purger, David, Tryggestad, Erik, McNutt, Todd, Christodouleas, John, Rigamonti, Daniele, Shokek, Ori, Sang, Won, Zhou, Jessica, Lim, Michael, Wong, John, and Kleinberg, Larry. 2008. "A Virtual Frame System for Stereotactic Radiosurgery Planning". United States. https://doi.org/10.1016/j.ijrobp.2008.06.1934.
@article{osti_21172481,
title = {A Virtual Frame System for Stereotactic Radiosurgery Planning},
author = {Ford, Eric and Purger, David and Tryggestad, Erik and McNutt, Todd and Christodouleas, John and Rigamonti, Daniele and Shokek, Ori and Sang, Won and Zhou, Jessica and Lim, Michael and Wong, John and Kleinberg, Larry},
abstractNote = {Purpose: We describe a computerized (or virtual) model of a stereotactic head frame to enable planning prior to the day of radiosurgery. The location of the virtual frame acts as a guide to frame placement on the day of the procedure. Methods and Materials: The software consists of a triangular mesh representation of the essential frame hardware that can be overlaid with any MR scan of the patient and manipulated in three dimensions. The software calculates regions of the head that will actually be accessible for treatment, subject to the geometric constraints of the Leksell Gamma Knife hardware. DICOM-compliant MR images with virtual fiducial markers overlaid onto the image can then be generated for recognition by the treatment planning system. Results: Retrospective evaluation of the software on 24 previously treated patients shows a mean deviation of the position of the virtual frame from the actual frame position of 1.6 {+-} 1.3 mm. Initial clinical use on five patients indicates an average discrepancy of the virtual frame location and the actual frame location of <1 mm. MR images with virtual fiducial markers can be imported into radiosurgical treatment planning software and used to generate an initial treatment plan. Conclusions: The virtual frame provides a tool for prospective determination of lesion accessibility, optimization of the frame placement, and treatment planning before the day of the procedure. This promises to shorten overall treatment times, improve patient comfort, and reduce the need for repeat treatments due to suboptimally placed frames.},
doi = {10.1016/j.ijrobp.2008.06.1934},
url = {https://www.osti.gov/biblio/21172481}, journal = {International Journal of Radiation Oncology, Biology and Physics},
issn = {0360-3016},
number = 4,
volume = 72,
place = {United States},
year = {Sat Nov 15 00:00:00 EST 2008},
month = {Sat Nov 15 00:00:00 EST 2008}
}